Originally Posted by Rog
Thanks chaps, it's not as difficult as it looks. It’s just a case of working out the connections as there’s not much information available out there, particularly re the pcb. I spent a lot of time pawing over the diagrams in the parts catalogue and the rest was ‘by guess’ and ‘by golly’. There was no disasters but at one point I did have the headlights flashing. I will endeavor to collect up all my scribbly scraps of paper from the garage floor and try and put a wiring diagram together at some point.

Well, I’ve collected up all my little ‘back of a fag packet sketches’ and had a stab at producing some wiring pictures. I needed something a bit prettier anyway to drop in the back of my handbook for the record so here you go... Hope it make sense rofl

But first! This is definitely not a ‘how to’. I’m just posting what I have done for the record should anybody else with gremlins in their pcb be interested. However please don’t blindly copy this as I’m certainly no electrician. I’m sure this isn’t necessarily the only or ‘best’ solution and most likely full of silly errors too.

So use with caution… exting



Dashboard switch assembly connections

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For simplicity I haven’t shown the switch’s LED ground wiring.




Relay assembly connections

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I mused over a number of possible solutions for the indicators and hazards circuit each with their own pros and cons. This is what I’ve settled on however it may be considered unnecessarily complicated as it incorporates a couple of diodes simply to work around the issue that I couldn’t find a suitable double pole matching toggle hazard switch with a LED so used a single. Others may have done it different but a of couple additional components and a little voltage drop was a small price to pay for my matching switches. I’m sure these heavy duty diodes will be super reliable but I now have spares in the tool tray just in case… The two hazard relay could have easily been combined into a single suitable double pole relay but typically what doubles are available are not really intended for the auto applications so using two regular singles seemed appropriate. It makes carrying spares and fault finding on the fly easier too. Also if I was doing it again, for simplicity I think I would skip the 9 way Molex and wire the switches directly to the relays for simplicity. I’m not a great fan of these washing machine connectors anyway smile
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Warning light PCB interface cable

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In case the colours arn't clear I used 0.5W 560Ω resistors for all the white warning light LED's and red PATS LED.

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Roger
2011 Plus 4